Fluctuation-induced shear flow and energy transfer in plasma interchange turbulence

Li, B.; Sun, C. K.; Wang, X. Y.; Zhou, A.; Wang, X. G.; Ernst, D. R.

doi:10.1063/1.4935912

Fluctuation-induced shear flow and energy transfer in plasma interchange turbulence

Journal Article · Wed Nov 18 23:00:00 EST 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4935912· OSTI ID:1469661

Li, B. ^[1]; Sun, C. K. ^[2]; ^[2]; Zhou, A. ^[2]; Wang, X. G. ^[2]; Ernst, D. R. ^[3]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Peking Univ., Beijing (China); Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts
Peking Univ., Beijing (China)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Fluctuation-induced E × B shear flow and energy transfer for plasma interchange turbulence are examined in a flux-driven system with both closed and open magnetic field lines. The nonlinear evolution of interchange turbulence shows the presence of two confinement regimes characterized by low and high E × B flow shear. In the first regime, the large-scale turbulent convection is dominant and the mean E × B shear flow is at a relatively low level. By increasing the heat flux above a certain threshold, the increased turbulent intensity gives rise to the transfer of energy from fluctuations to mean E × B flows. As a result, a transition to the second regime occurs, in which a strong mean E × B shear flow is generated.

View Accepted Manuscript (DOE)

Research Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FC02-08ER54966

OSTI ID:: 1469661

Alternate ID(s):: OSTI ID: 1226661
OSTI ID: 22489837

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 11 Vol. 22; ISSN PHPAEN; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Global 3D two-fluid simulations of the tokamak edge region: Turbulence, transport, profile evolution, and spontaneous E × B rotation Zhu, Ben; Francisquez, Manaure; Rogers, Barrett N. Physics of Plasmas, Vol. 24, Issue 5 https://doi.org/10.1063/1.4978885	journal	May 2017

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